Apply suggestions from code review

Co-authored-by: Natalia Ivakina <82437520+NataliaIvakina@users.noreply.github.com>

Author: yirensum

modules/ROOT/pages/backup-restore/online-backup.adoc

@@ -396,11 +396,9 @@ The server selection occurs in the following order:
 ==== Using `--parallel-download`
 
 Starting from 2025.11, the `--parallel-download` option is available.
-When enabled, the backup process will pull data from multiple instances which have been either defined in the
---from or determined from --remote-address-resolution.
+When enabled, the backup process pulls data from multiple servers which have been either defined in the `--from` option or determined from `--remote-address-resolution`.
 
-Note that this will speed up the backup process if there are enough throughput provisioned in both the
-backup process and the instances from which data is being pulled from.
+Note that this will speed up the backup process if sufficient throughput is provisioned for both the backup process and the source servers from which data is being pulled.
 
 [[online-backup-example]]
 == Examples